多年冻土区框架热锚管边坡支护结构的提出及简化设计方法初探

发布时间：2018-01-05 00:02

本文关键词：多年冻土区框架热锚管边坡支护结构的提出及简化设计方法初探　出处：《铁道学报》2017年07期 　论文类型：期刊论文

【摘要】：为解决多年冻土区冻融循环及全球气温升高引起的边坡失稳问题,基于"主动冷却"保护冻土的理念,结合框架锚杆和热棒制冷技术,提出一种既可主动降温、又能锚固支挡、还能减轻冻胀破坏,且适用于多年冻土边坡的新型支护结构,并阐述其技术原理;提出极限承载力和热量平衡两个设计控制指标,给出热-力共同控制的设计计算方法。将该结构和相应的计算方法应用于工程实例,计算结果表明:所提出结构不仅能防止多年冻土边坡上限退化,甚至能抬升上限,进而提高冻土边坡的稳定性;给出的计算方法能够较为准确描述结构的工作机理,为该结构的设计提供理论依据和参考。
[Abstract]:In order to solve the permafrost region of the freeze-thaw cycle and global warming caused by slope instability problems, based on the "active cooling" permafrost protection concept, combined with the framework of the anchor and the heat pipe cooling technology, this paper presents a new active cooling, and anchor retaining, but also reduce the frost heaving damage, and is suitable for permafrost slope new supporting structure, and describes its technical principle; put forward the ultimate bearing capacity and the heat balance of the two design control index, design and calculation of thermal stress are common control methods. The application of the structure and the corresponding calculation method in engineering example, the calculation results show that the proposed structure can not only prevent the upper limit of permafrost slope degradation. Even lifting limit, so as to improve the stability of permafrost slope; this method can accurately describe the working mechanism of the structure, and provide a theoretical basis for design of the structure.

【作者单位】：兰州理工大学甘肃省土木工程防灾减灾重点实验室;中国科学院西北生态环境资源研究院冻土工程国家重点实验室;兰州理工大学理学院;
【基金】：国家自然科学基金(51268037) 甘肃省杰出青年基金(145RJDA330) 冻土工程国家重点实验室开放基金(SKLFSE201510)
【分类号】：TU476
【正文快照】： 因为工程建设规模的逐渐扩大和全球气候变暖对冻土环境的影响,冻土边坡失稳灾害越来越多。例如,仅青藏高原风火山附近热融滑塌就有10多处[1-2];美国的费尔班克斯-都逊科里克公路经一年冬季有800km遭到滑坡损害,冻土边坡灾害对道路安全运营造成重大威胁[3]。冻土的特殊物理性质

【相似文献】